139971572 has 36 divisors (see below), whose sum is σ = 272673828. Its totient is φ = 62496000.

The previous prime is 139971553. The next prime is 139971577. The reversal of 139971572 is 275179931.

It can be written as a sum of positive squares in 2 ways, for example, as 44009956 + 95961616 = 6634^2 + 9796^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139971577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48572 + ... + 51372.

It is an arithmetic number, because the mean of its divisors is an integer number (7574273).

Almost surely, 2^139971572 is an apocalyptic number.

It is an amenable number.

139971572 is a deficient number, since it is larger than the sum of its proper divisors (132702256).

139971572 is a wasteful number, since it uses less digits than its factorization.

139971572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880 (or 2847 counting only the distinct ones).

The product of its digits is 119070, while the sum is 44.

The square root of 139971572 is about 11830.9582029521. The cubic root of 139971572 is about 519.2142620388.

The spelling of 139971572 in words is "one hundred thirty-nine million, nine hundred seventy-one thousand, five hundred seventy-two".